<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		div::before{
			content:"不爽";
		}

		div::after{
			content: "要是今天周五就好了";
		}
	</style>
</head>
<body>
	<div>今天周三了,晚上我又要值班了!~</div>
</body>
</html>